Which packet type does the router use to request up-to-date link-state information?
A.
IIH
B.
LSP
C.
PSNP
D.
CSNP
Which packet type does the router use to request up-to-date link-state information?
Which packet type does the router use to request up-to-date link-state information?
When a Services Router receives a CSNP, it checks the database entries again its own local link-state database. If it detects missing information, the router requests specific LSP details using a partial sequence number PDU (PSNP).